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// Portions Copyright 2018-2022 Payara Foundation and/or its affiliates
// Payara Foundation and/or its affiliates elects to include this software in this distribution under the GPL Version 2 license
package org.glassfish.appclient.common;

import com.sun.enterprise.security.integration.PermsHolder;
import com.sun.enterprise.security.permissionsxml.GlobalPolicyUtil;

import java.io.IOException;
import java.net.URLClassLoader;
import java.security.CodeSource;
import java.security.PermissionCollection;

import static org.glassfish.appclient.common.PermissionsUtil.getClientDeclaredPermissions;
import static org.glassfish.appclient.common.PermissionsUtil.getClientEEPolicy;
import static org.glassfish.appclient.common.PermissionsUtil.getClientRestrictPolicy;

public class ClientClassLoaderDelegate {

    protected static final String PERMISSIONS_XML = "META-INF/permissions.xml";

    private URLClassLoader classLoader;
    private PermsHolder permHolder;

    public ClientClassLoaderDelegate(URLClassLoader cl) {
        this.classLoader = cl;
        loadPemissions();
    }

    private void loadPemissions() {
        try {
            processDeclaredPermissions();
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
    }

    private void processDeclaredPermissions() throws IOException {
        if (System.getSecurityManager() == null) {
            return;
        }

        PermissionCollection declaredPermissionCollection = getClientDeclaredPermissions(classLoader);

        PermissionCollection eePc = getClientEEPolicy(classLoader);
        PermissionCollection eeRestriction = getClientRestrictPolicy(classLoader);

        GlobalPolicyUtil.checkRestriction(eePc, eeRestriction);
        GlobalPolicyUtil.checkRestriction(declaredPermissionCollection, eeRestriction);

        permHolder = new PermsHolder(eePc, declaredPermissionCollection, eeRestriction);
    }

    public PermissionCollection getCachedPerms(CodeSource codesource) {
        return permHolder.getCachedPerms(codesource);
    }

    public PermissionCollection getPermissions(CodeSource codesource, PermissionCollection parentPC) {
        return permHolder.getPermissions(codesource, parentPC);
    }

}
